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حجت امامی علیرضا آستارایی امیر فتوت

چکیده

کیفیت خاک اهمیت زیادی در ارزیابی وضعیت حاصلخیزی و فیزیکی خاک دارد و در تعیین آن باید ویژگیهای فیزیکی و شیمیایی خاک لحاظ شود. این پژوهش جهت بررسی تاثیر مواد آلی بر مقادیر کمی کیفیت خاک انجام شد. بدین منظور سه سطح (15، 30 و 60 تن در هکتار) از ترکیبات مختلف ماده آلی شامل کمپوست زباله شهری، لجن فاضلاب، کود گاوی، کاه و کلش گندم به همراه تیمار شاهد در سه تکرار به خاک لومی اضافه شدند و به مدت شش ماه در 70 درصد رطوبت ظرفیت زارعی در گلخانه نگهداری شدند. سپس کیفیت خاک با استفاده از 14 شاخص فیزیکی و شیمیایی و بر اساس تابع نمره دهی غیرخطی تعیین شد. نتایج نشان داد که نمره تیمار شاهد 7/52 بود و کیفیت خاک در کلاس 4 یعنی پایین قرار داشت. افزودن مواد آلی مختلف، سبب بهبود کیفیت خاک شد و کلاس کیفیت خاک بین یک یا دو درجه ارتقاء یافت. در بین تیمارهای مورد بررسی بیشترین میزان در بهبود کیفیت خاک در نتیجه افزودن 60 تن در هکتار لجن فاضلاب و سطوح 30 و 60 تن در هکتار کمپوست به دست آمد. افزودن سایر تیمارهای مواد آلی نیز باعث افزایش مقادیر کمی کیفیت خاک نسبت به شاهد و ارتقاء کلاس کیفیت خاک به میزان یک درجه شد. در بین شاخصهای مورد بررسی، عناصر آهن، منگنز، روی، تخلخل تهویه ای و میانگین وزنی قطر خاکدانه ها از مهمترین عوامل تضعیف کننده کیفیت خاک در تیمار شاهد بودند، که افزودن کمپوست و لجن فاضلاب سبب افزایش نمره آنها شد.

جزئیات مقاله

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ارجاع به مقاله
امامیح., آستاراییع., & فتوتا. (2014). ارزیابی تاثیر مواد آلی بر توابع نمره دهی کیفیت خاک. آب و خاک, 28(3), 565-574. https://doi.org/10.22067/jsw.v0i0.22840
نوع مقاله
علمی - پژوهشی